Thimble for repairing boiler-tubes.



wqHzMo'RGAN., .THiMBLE -FCDRl REPIRING BOILER TUBES.

' APPLICATION. m50 my 14. 191487.

" Patented Nov.

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WILLIAM H. MORGAN, or MARSEILLES,

ILLINOIS, ASSIGNOR OF ONE-HALF TO PETER HYLAND PROCTOR, OF MARSEILLES, ILLINOIS.

THIMBLE FOR REPAIRING BOILER-TUBES.

Specification of Letters'Patent.

Patented Nov. 19, 1918.

Application led May 14, 1918. Serial No. 234,564.

To all lwhom it may concern.'

Be it known that I, WILLIAM a citizen of the United States, residing at Marseilles, in the county of La Salle and State of Illinois, have invented a new and useful Thimble for Repairing Boiler-Tubes, of which the following is a specification.

It is the object of this invention to provide novel means for reinforcing or patching, internally, a boiler tube which has become weakened, and to provide a novel process whereby such a result may be brought about.

It is within the province of the disclosure to improve generally and to enhance the utility of devices of that type to which the present invention appertams.

With the above and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be made within the scope of what is claimed, without departing from the spirit of the invention.

In the accompanying drawings Figure 1 shows in side elevatlon, a device constructed in accordance with the present invention, parts being broken away, the structure-being mounted in a boiler tube and about to be advanced;

Fig. 2 is a cross section on the line 2 -2 of Fig. 1;

Fig. 3 is a view similar to Fig. 1 but showing the parts as ythey will appear after the device has been advanced to the point of application Fig. 4 is a perspective showing one end of the pusher; and

Fig. 5 is a longitudinal section showing a slightly modified form of the invention.

In the accompanying drawings, the numeral 1 indicates a boiler sheet carrying a tube 2.

In carrying out the present invention therey -is provided a trough shaped member 3 and a trough shaped member 4, members 3 and 4 preferably being made of metal, and having some resiliency. The members 3 and..4 are provided with coperating longitudinally inclined edges 5, so that, in effect, thetrough shaped members 3 and 4 are wedged shaped. The trough shaped member 4 is curved transversely, as shown at 6, upon a slightly shorter radius than is the trough shaped member 3, v

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' so that, whereas the trough shaped member 3 lits closely and frictionally in the tube 2, the trough shaped member 4 fits somewhat loosely therein, the engagement between the member 3 and the tube 2 designated by the numeral 7 in Fig. 2, and the relation existing between the member 4 and the tube 2 being denoted by the numeral 8 in Fig. 2.

The numeral 9 denotes a pusher preferably made up of any desired number of sections 10 and 11, the section 11 having a handle 12, and the sections being detachably connected as shown at 14. The section 10 of the pusher carries a head 15 secured at 16 to the section 10, and having an outer shoulder 17 and an inner shoulder 18, spaced apart longitudinally of the pusher.

-In practical operation, the trough shaped members 3 and 4 are placed in the end of the tube 2 in longitudinally stepped relation, as shown at 20, the inclined edges 5 of the members coacting vwith each other. The inner shoulder 18 of the pusher is placed against one end of the member 4, and the outer shoulder 17 of the pusher 4is against the corresponding end of the member 3. The parts are shown thus arranged in Fig. 1. The members 3 and 4 are advanced by the pusher in longitudinally stepped relation, as

indicated at 20, until the weak point in the tube 2 is reached. Then the pusher 9 is rotated until, as shown in Fig. 3, the outer shoulder 17 of the pusher bears against the end of the member 4, whereupon the member 4 is advanced with respect to the member 3, the member 3 remaining stationary, because it has a close frictional hold, as shown at 7, on the tube 2, the member 4 advancing readily under the action of the pusher, because, as shown at 8, the member 4 does not it so closely in the tube 2 as does the member 3. When the member 4 is advanced with respect to the member 3, the edges 5 of the members coact and expand the members in the tube 2, a sealing and a reinforcement of the tube thus being brought about. Fig. 3 shows the members 3v and 4 in the position above alluded to. .Since the pusher 9V is made up of any desired number of sections 10 and 11, the reinforcement may be applied at any desiredpoint between the ends jof the tube 2.

In case it should be desired to patch or reinforce a boiler tube at one end, then the structure shown in Fig. 5 is resorted to. vIn Fig. 5, parts hereinbefore described are designated by numerals previously used,

with the suiix a. In this form of the invention, the members 4 and 3 are provided on their outer ends with flanges 19 which cooperate with the sheet l.

Having thus described the invention, what is claimed is 1. A device of the class described, comprising a pair of trough-shaped members having longitudinally inclined edges, one of said members being curved transversely upon a shorter radius than that upon which the other member is curved.

2. A device of the class described, comprising a pair of trough-shaped members having longitudinally inclined coperating edges; and a pusher having inner and outer shoulders, the inner shoulder coperating' with one member, and the outer shoulder cooperating With the other member, to advance both members simultaneously in longitudi- -nally stepped relation, the pusher being rotatable to present the outer shoulder to the first specified member, thereby to advance said member with respect to the other member, after both members have been advanced simultaneously by the pusher toa point of application.

3. A method of patching a tube, which con* sists in placing in the tube, in longitudinally stepped relation, a pair of trough-shaped members having longitudinally inclined cooperating edges; maintaining said members in longitudinally stepped relation and advancing them together by engaging their ends with the inner and outer shoulders of a pusher; rotating the pusher to shift the outer shoulder of the pusher from the end of one member to the end of the other member; and then advancing the last specified member with respect to its fellow, by the action of the outer shoulder, whereby the inclined edges of the members will effect a transverse expansion of the members.

' In testimony that I claim the foregoing asA my oWn, I have hereto alixed my signature in the presence of twowitnesses.

WILLIAM H. MORGAN. Witnesses:

JOHN M. NICHOLSON, FRED CosLETT. 

